U.S. Border Patrol agents found a rocket launcher, assault rifles and explosives in a bag along the Rio Grande river in Texas, the agency said on Wednesday, suggesting a link to Mexico’s drug wars.

Agents discovered the weapons on Tuesday on a quiet stretch of the Rio Grande near Fronton, a small community about 210 miles south of San Antonio. No arrests have been made.

“These deadly weapons could have had a devastating impact on communities on both sides of the border and to our agents and other law enforcement officers,” Rosendo Hinojosa, head of the Border Patrol in the Rio Grande valley, said in a statement.